Ross AMA-8511 User manual

Brand: Ross

Model: AMA-8511

Category: Audio amplifiers

Type: User manual

Ross Video Limited

AMA-8511

AES/EBU Distribution Amplifier and Converter

User Manual

Ross Part Number: 8511D-004

Issue: 03

AMA-8511 • AES/EBU Distribution Amplifier and Converter User Manual

• Ross Part Number: 8511D-004

• Document Issue: 03

• Release Date: December 21, 2005. Printed in Canada.

The information contained in this User Manual is subject to change without notice or obligation.

Contents of this publication may not be reproduced in any form without the written permission of Ross

Video Limited. Reproduction or reverse engineering of copyrighted software is prohibited.

Notice

The material in this manual is furnished for informational use only. It is subject to change without

notice and should not be construed as a commitment by Ross Video Limited. Ross Video Limited

assumes no responsibility or liability for errors or inaccuracies that may appear in this manual.

Trademarks

• is a registered trademark of Ross Video Limited.

• Ross, ROSS, ROSS



, and MLE are registered trademarks of Ross Video Limited.

• All other product names and any registered and unregistered trademarks mentioned in

this manual are used for identification purposes only and remain the exclusive property

of their respective owners.

Important Regulatory and Safety Notices

Before using this product and any associated equipment, refer to the “Important Safety Instructions”

listed below so as to avoid personnel injury and to prevent product damage.

Products may require specific equipment, and /or installation procedures be carried out to satisfy

certain regulatory compliance requirements. Notices have been included in this publication to call

attention to these Specific requirements.

Symbol Meanings

This symbol on the equipment refers you to important operating and maintenance

(servicing) instructions within the Product Manual Documentation. Failure to heed

this information may present a major risk of damage or injury to persons or

equipment.

Warning

The symbol with the word “Warning” within the equipment manual indicates a

potentially hazardous situation, which if not avoided, could result in death or serious

injury.

Caution

The symbol with the word “Caution” within the equipment manual indicates a

potentially hazardous situation, which if not avoided, may result in minor or

moderate injury. It may also be used to alert against unsafe practices.

Notice

The symbol with the word “Notice” within the equipment manual indicates a

situation, which if not avoided, may result in major or minor equipment damage or a

situation which could place the equipment in a non-compliant operating state.

ESD

Susceptibility

This symbol is used to alert the user that an electrical or electronic device or

assembly is susceptible to damage from an ESD event.

Important Safety Instructions

Caution

This product is intended to be a component product of the RossGear 8000 series

frame. Refer to the RossGear 8000 series frame User Manual for important safety

instructions regarding the proper installation and safe operation of the frame as well

as it’s component products.

Warning

Certain parts of this equipment namely the power supply area still present a safety

hazard, with the power switch in the OFF position. To avoid electrical shock,

disconnect all A/C power cords from the chassis' rear appliance connectors before

servicing this area.

Warning

Service barriers within this product are intended to protect the operator and service

personnel from hazardous voltages. For continued safety, replace all barriers after

any servicing.

This product contains safety critical parts, which if incorrectly replaced may present

a risk of fire or electrical shock. Components contained within the product’s power

supplies and power supply area, are not intended to be customer serviced and should

be returned to the factory for repair.

To reduce the risk of fire, replacement fuses must be the same type and rating.

Only use attachments/accessories specified by the manufacturer.

EMC Notices

US FCC Part 15

This equipment has been tested and found to comply with the limits for a class A Digital device,

pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection

against harmful interference when the equipment is operated in a commercial environment. This

equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in

accordance with the instruction manual, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause harmful interference in which case

users will be required to correct the interference at their own expense.

Notice

Changes or modifications to this equipment not expressly approved by Ross Video

Ltd. could void the user’s authority to operate this equipment.

CANADA

This Class “A” digital apparatus complies with Canadian ICES-003.

Cet appareil numerique de classe “A” est conforme à la norme NMB-003 du Canada.

EUROPE

This equipment is in compliance with the essential requirements and other relevant provisions of CE

Directive 93/68/EEC.

INTERNATIONAL

This equipment has been tested to CISPR 22:1997 along with amendments A1:2000 and A2:2002 and

found to comply with the limits for a Class A Digital device.

Notice

This is a Class A product. In domestic environments this product may cause radio

interference in which case the user may have to take adequate measures.

Maintenance/User Serviceable Parts

Routine maintenance to this RossGear product is not required. This product contains no user

serviceable parts. If the module does not appear to be working properly, please contact Technical

Support using the numbers listed under the “Contact Us” section on the last page of this manual. All

RossGear products are covered by a generous 5-year warranty and will be repaired without charge for

materials or labor within this period. See the “Warranty and Repair Policy” section in this manual for

details.

Environmental Information

The equipment that you purchased required the extraction and use of natural resources for its

production. It may contain hazardous substances that could impact health and the environment.

To avoid the potential release of those substances into the environment and to diminish the need for

the extraction of natural resources, Ross Video encourages you to use the appropriate take-back

systems. These systems will reuse or recycle most of the materials from your end-of-life equipment in

an environmentally friendly and health conscious manner.

The crossed-out wheeled bin symbol invites you to use these systems.

If you need more information on the collection, reuse, and recycling systems, please contact your local

or regional waste administration.

You can also contact Ross Video for more information on the environmental performances of our

products.

AMA-8511 User Manual (Iss. 03) Contents • i

Contents

Introduction 1-1

In This Chapter .......................................................................................................................1-1

A Word of Thanks....................................................................................................1-1

Overview ..................................................................................................................1-2

Functional Block Diagram .......................................................................................1-2

Features ....................................................................................................................1-3

Documentation Terms ..............................................................................................1-3

Installation and Setup 2-1

In This Chapter .......................................................................................................................2-1

Static Discharge........................................................................................................2-1

Unpacking ................................................................................................................2-1

De-Emphasis Jumper Setup......................................................................................2-2

Coarse Level Jumper Setup......................................................................................2-2

Fine Level Adjustment .............................................................................................2-3

Fault Report Jumper Setup .......................................................................................2-3

Board Installation .....................................................................................................2-3

BNC Labels ..............................................................................................................2-3

Cable Connections....................................................................................................2-4

Audio Levels ............................................................................................................2-6

LEDs.........................................................................................................................2-7

SMPTE 269M Fault Reporting 3-1

In This Chapter .......................................................................................................................3-1

Overview ..................................................................................................................3-1

Jumper Setup ............................................................................................................3-2

Frame Connections...................................................................................................3-2

Details.......................................................................................................................3-2

Specifications 4-1

In This Chapter .......................................................................................................................4-1

Technical Specifications...........................................................................................4-1

Channel Status Data .................................................................................................4-3

Service Information 5-1

In This Chapter .......................................................................................................................5-1

Troubleshooting Checklist .......................................................................................5-1

Warranty and Repair Policy .....................................................................................5-2

ii • Contents AMA-8511 User Manual (Iss. 03)

Ordering Information 6-1

In This Chapter ...................................................................................................................... 6-1

AMA-8511 and Related Products ........................................................................... 6-1

AMA-8511 User Manual (Iss. 03) Introduction • 1-1

Introduction

In This Chapter

This chapter contains the following information sections:

• A Word of Thanks

• Overview

• Functional Block Diagram

• Features

• Documentation Terms

A Word of Thanks

Congratulations on choosing the Ross Video AMA-8511 AES/EBU Distribution Amplifier and

Converter. The AMA-8511 is part of a full line of Digital Products within the RossGear Terminal

Equipment family of products, backed by Ross Video’s experience in engineering and design expertise

since 1974.

You will be pleased at how easily your new AMA-8511 fits into your overall working environment.

Equally pleasing is the product quality, reliability and functionality. Thank you for joining the group

of worldwide satisfied Ross Video customers!

Should you have a question pertaining to the installation or operation of your AMA-8511, please

available for consultation, training, or service.

1-2 • Introduction AMA-8511 User Manual (Iss. 03)

Overview

The RossGear AMA-8511 AES/EBU Distribution Amplifier and Converter is a broadcast quality

digital AES/EBU audio reclocking distribution amplifier, as well as a modular product used to convert

20 or 24 bit AES-3id (coaxial) signals to analog audio. The AMA-8511 accepts one 32, 44.1, or

48kHz sample rate AES/EBU audio signal and provides two copies of balanced stereo (A, B) analog

audio and four reclocked copies of the input signal. The RossGear AMA-8511 is designed for use in

75-ohm coaxial SMPTE 276M or AES-3id systems.

The AMA-8511 provides automatic cable equalization for lengths up to and beyond 610m (2000 ft.).

The D/A converter uses a state of the art 24bit 128X over-sampled Delta Sigma Modulator DAC to

convert to analog audio. Following the D/A conversion, the analog audio passes through a very high

quality reconstruction filter that assures low distortion and noise. Two identical copies of the analog

signal are output via the rear plug-on module, the CON-8516 AES Audio Connector (included with

the card).

A coarse level adjustment headroom jumper (18dB or 24dB), and a fine adjustment potentiometer

(±6dB) are provided to precisely match to your facility’s house reference audio level. The AMA-8511

can accommodate any full-scale digital (FSD) level in the -12 to - 30dBFS range. Automatic detection

of AES/EBU 50/15µs de-emphasis is available for all data rates.

The AMA-8511 has been designed with the capability to report a variety of AES signal errors

including No Lock, Coding, Parity, CRC, and Validity. These errors are indicated on a card edge

LED. In addition, there is a SMPTE 269M fault reporting output to the back of the Ross frame.

The AMA-8511 fits into Ross 8000A series digital frames, the DFR-8110A (2RU) and the DFR-

8104A (1RU), and provides system builders with the ability to easily distribute and convert digital

audio within a facility.

A reclocking amplifier is the preferred method of distribution for long coaxial runs to reduce jitter in

the data stream. The AMA-8511 performs reclocking in a two-stage process that develops an output,

which is stable and noise-free.

The AMA-8511 is part of a complete line of RossGear AES solutions that includes distribution,

conversion, and monitoring. Designed and manufactured to meet the highest quality broadcast

industry standards, the RossGear AMA-8511 is an ideal, flexible, and cost effective solution for your

digital audio reclocking distribution and digital to analog conversion requirements.

Functional Block Diagram

Figure 1. Simplified Block Diagram of AMA-8511 Functions

AMA-8511 User Manual (Iss. 03) Introduction • 1-3

Features

The following features make the AMA-8511 a great choice for your AES/EBU reclocking distribution

and conversion requirements:

• Support for 32, 44.1, and 48kHz sampling rates

• 24-bit DAC resolution

• Reclocking to reduce output jitter and noise

• Conformity to AES 3id 1995

• Adjustable headroom level

• Two stereo audio outputs

• Terminating input 75Ω

• Auto equalization for > 610m (2000 ft.) of Belden 8281 cable

• Ten card capacity in the Ross DFR-8110A (2RU) digital rack frame

• Four card capacity in the Ross DFR-8104A (1RU) digital rack frame

• Visual indication of signal presence

• Visual indication of an error condition

• SMPTE 269M Fault Reporting

• 5-year transferable warranty

Documentation Terms

The following terms are used throughout this guide:

• “Frame” refers to the DFR-8104A and DFR-8110A frames that house the

AMA-8511 card.

• All references to the DFR-8104A and DFR-8110A also include the

DFR-8104A-C and DFR-8110A-C versions with the cooling fan option. See the

respective User Manuals for details.

• “Operator” and “User” both refer to the person who uses the AMA-8511.

• “Board”, “Card”, and “Module” all refer to the AMA-8511 board itself, including

all components and switches.

• “System” and “Video system” refers to the mix of interconnected production and

terminal equipment in which the AMA-8511 operates.

1-4 • Introduction AMA-8511 User Manual (Iss. 03)

AMA-8511 User Manual (Iss. 03) Installation and Setup • 2-1

Installation and Setup

In This Chapter

This chapter contains the following information sections:

• Static Discharge

• Unpacking

• De-Emphasis Jumper Setup

• Coarse Level Jumper Setup

• Fine Level Adjustment

• Fault Report Jumper Setup

• Board Installation

• BNC Labels

• Cable Connections

• Audio Levels

• LEDs

Static Discharge

Whenever handling the AMA-8511 and other related equipment, please observe all static discharge

precautions as described in the following note:

ESD

Susceptibility

Static discharge can cause serious damage to sensitive

semiconductor devices. Avoid handling circuit boards in high

static environments such as carpeted areas, and when wearing

synthetic fiber clothing. Always exercise proper grounding

precautions when working on circuit boards and related

equipment.

Unpacking

Unpack each AMA-8511 you received from the shipping container, and check the contents against the

packing list to ensure that all items are included. If any items are missing or damaged, contact your

sales representative or Ross Video directly.

2-2 • Installation and Setup AMA-8511 User Manual (Iss. 03)

Figure 2. User Control Locations

De-Emphasis Jumper Setup

Jumper JP2 allows the AMA-8511 to force De-Emphasis according to the current sampling rate.

Select one of the following options for JP2:

• On — AMA-8511 forces de-emphasis (50/15us) according to the current

sampling rate.

• Off — No de-emphasis filtering (default setting).

Coarse Level Jumper Setup

The following table explains how to make the coarse-level selections that determine the desired analog

output signal using the headroom jumpers JP1 and JP3.

Table 1. AMA-8511 Coarse Level Jumper Settings

Jumper Designation Mode Description / Function

+24

Sets coarse Headroom level for A channel to +24dBu

(default setting)

JP1

A Level

+18 Sets coarse Headroom level for A channel to +18dBu

+24

Sets coarse Headroom level for B channel to +24dBu

(default setting)

JP3

B Level

+18 Sets coarse Headroom level for B channel to +18dBu

JP4

Fault Report

JP3

A Level

JP1

B Level

JP2

De-Emphasis

RV1

A Gain

RV2

B Gain

AMA-8511 User Manual (Iss. 03) Installation and Setup • 2-3

Fine Level Adjustment

The following table explains making level adjustments (±6dB) for each channel using potentiometers,

RV1 and RV2. If necessary, use the EXT-8100 Extender Board to adjust the potentiometers with the

card running in the frame.

Table 2. AMA-8511 Potentiometer Adjustments

Potentiometer Designation Description / Function

RV1

A Gain Used to set fine level adjustment for A channel output gain

RV2

B Gain Used to set fine level adjustment for B channel output gain

Note

RV1 and RV2 are factory adjusted for unity gain and should

not need adjusting.

An extender card is required (EXT-8100) to adjust

potentiometer settings. See the “Optional Equipment” section

in Chapter 4 for details.

For an AES input of -20dBFS, with JP1 and JP3 set to

+24dBu, the analog audio output will be +4dBu.

Fault Report Jumper Setup

Select SMPTE 269M Fault Reporting, ENABLED or DISABLED, via JP4 The default is EN.

See Chapter 3, “SMPTE 269M Fault Reporting” for complete details.

Board Installation

Use the following steps to install the AMA-8511 in a RossGear 8000 series digital distribution frame:

1. Refer to the User Manual of the RossGear 8000 series frame, to ensure that the

frame is properly installed according to instructions.

2. Please note that heat and power distribution requirements within a frame may dictate

specific slot placement of cards. Cards with many heat-producing components

should be arranged to avoid areas of excess heat build-up, particularly in frames

using convectional cooling.

3. After selecting the desired frame installation slot, hold the AMA-8511 card by the

edges and carefully align the card edges with the slots in the frame. Then fully insert

the card into the frame until the rear connection plug is properly seated.

BNC Labels

Affix the supplied BNC label, as per the included instructions, to the BNC area on the rear of the rack

frame.

2-4 • Installation and Setup AMA-8511 User Manual (Iss. 03)

Cable Connections

This section provides instructions for connecting cables to the AMA-8511 when mounted in RossGear

8000 series Digital Products Frames.

Connect the input and output cables according to the frame rear panel connections diagram in the

following figure and discussions. The inputs are internally terminated in 75 ohms. It is not necessary

to terminate unused outputs.

Figure 3. AMA-8511 BNC and Audio Plug Designations for RossGear DFR-8110A (2RU Frame)

AES Input

The AES audio input should be connected to the “IN” BNC on the rear of the frame.

Note

If the AES input signal is disrupted, the AMA-8511 will

generate invalid analog audio output.

AES Output

Four reclocked AES outputs are available on BNC connectors 1, 2, 3, and 4.

AMA-8511 User Manual (Iss. 03) Installation and Setup • 2-5

Analog Audio Output

The AMA-8511 uses a rear sub-module (CON-8516) to access the balanced audio outputs. The sub-

module plugs onto BNCs 5, 6, 7, and 8 on the rear of the Ross DFR-8104A or DFR-8110A frames.

On the CON-8516 module there are removable connectors for OUT-A and OUT-B. Each connector

has sockets for the positive, negative, and grounded wires of a balanced analog audio cable.

Two copies of the analog audio signal (OUT A1&A2, OUT B1&B2) are available via plug-on

connectors on the CON-8516.

The AMA-8511 can accommodate any full-scale digital level in the -12 to -30dBFS range. To adjust

the output level, select the approximate dBFS level (18dB or 24dB) using the headroom jumpers (A

Level and B Level) and then turn the potentiometers (RV1 and RV2) to trim (± 6dB) the analog output

to match your installation's standard.

Wire the external cables to the plug-able terminal block connectors as outlined in the diagram and

procedure below.

Figure 4. Connector Wiring for CON-8516 Module

1. Insert an analog audio wire to the designated polarity slot on the connector.

2. Use a tweaker screwdriver to tighten the corresponding screw on the underside of

the connector.

3. Repeat steps 1 and 2 for each wire on each connector.

Once the cables have been wired to the connectors, install the connectors to the sockets on the

CON-8516 module so that the slotted tongue fits in the grooves on the module socket.

2-6 • Installation and Setup AMA-8511 User Manual (Iss. 03)

Audio Levels

Figure 5. Graphs of Amplitude vs. Distortion

The graphs of amplitude vs. distortion for analog and digital audio equipment show that digital audio

does not gradually degrade (become more distorted) as the amplitude increases. Likewise, the digital

audio signal does not exist above 0dBFS. For these reasons, the interface between existing analog

house reference standards, and digital audio standards are as shown in the following table:

Table 3. Analog House Reference & Digital Audio Interface

Existing House

Reference

Desired

Headroom

Set AMA-8511 Maximum

Output Level to:

Typical

Application

0dBu 14dB +14dBu AES/EBU for Audio Production

+4dBu 20dB +24dBu AES/EBU for Audio Production

+8dBu 20dB +28dBu AES/EBU for 525 Video

+4dBu 18dB +22dBu AES/EBU for 625 Video

+4dBu 22dB +26dBu AES/EBU for 625 Video

AMA-8511 User Manual (Iss. 03) Installation and Setup • 2-7

LEDs

The front edge of the module has two LED indicators, which show the status of the amplifier. They are

described in the following figure and table. The module is operating correctly when the Input Present

LED is lit and the Error LED is not lit.

Input Present LED

Error LED

Figure 6. AMA-8511 Status LEDs

Table 4. AMA-8511 Status LED Indicator Descriptions

LED Reference Status Description

Input

Present

Green Indicates presence of an input signal.

Error

Red

One or more of the following problems have been encountered:

1. No Lock - There was an error with the incoming signal

2. Coding - Bi-phase coding violation

3. Parity - There was a parity error

4. CRC - Error in the CRC calculation

5. Validity - The integrity of this sub-frame is in question

2-8 • Installation and Setup AMA-8511 User Manual (Iss. 03)

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Ross AMA-8511 User manual

Brand: Ross

Model: AMA-8511

Category: Audio amplifiers

Type: User manual

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